I personally would use Word because it has the potential to create the cover letter and attach a resume along with it. 
Excel is more for tables and creating an organized way to see your recordings. 
PowerPoint is known for presentations mainly.
Twitter is a type of social media platform that is useful in communication. 
        
                    
             
        
        
        
 Answer:
C) Multiple reviewers have to be able to view one another's changes after they are made.
Explanation:
 
        
             
        
        
        
Answer:
li=list(map(str,input().strip().split()))#taking input of the string.
#swapping first and last element.
temp=li[0]
li[0]=li[-1]
li[-1]=temp
print(li)#printing the list.
Explanation:
I have taken the list li for taking the input of strings.Then after that swapping first and last element of the list.Then printing the list.